Grinding and truing appliance for shafts.



H. A. WHITE.

GRINDING AND TRUING APPLIANCE FOR SHAFTS,

APPLIUATION rmm Ammo, 1914.

1,1 17,73 Y Patented N0v.17,1914.

Wiinessas. Inventor.

Henry A.Whi1e.

neuron.

EHIETE. 3313 QOUTH-BFMHTEEE, MASMCEUSETIFS.

@RIHDING' MID EQUINE APPLIANCE FOR SHAFTB.

duplication filed April so, was.

is may concern Be ioiown that 1, Honor A. WHITE, a citizen the Unlined States, residing ai- Soutb Brninlzree, county oi Norfolk, Slzcte of 'hlsssecbuscils, have invented an improverc-snl in Grinding and Truing Appliances i of which the following descripv bi on, connection Wlill the accompanying nppl such as the c'anl: elicits of engines, pins and the like.

I imown that the shafts or crank of engines become flattened upon ihe es the impact from the pisa es lghe takingup oi the bearings emesly the dilhculiy and it can only cit to enact cynew bearings or This ordilabor or re worn ports to the factory thus oi considerable time in the inn-chine. i eels oi the present invention nvenien. 2001 which may be y re, 1 or machine she or utozuobi l or tool and :v sch i e invention is to prorrbiclr. does not require the a skilled machinist to properly be worn or crank pins.

" objects of th invention and the "ill more fully appear from rripriou and the accomnnd will be particularly annexed claims.

in the din ni e: Fic'ure l is a side eleva- L: i c

' tion of a grinding and truing hand tool illustrated es applied '50 a crank shaft being ground, the shaft being shown 11) section,

Fig. is a vertical sectional view of the tool b-ea-d and the inclosed bushing, Fig. is on end view of the loci applied to :1 crank shaft which is being groiuid.

The up laii'llii is illustrated herein as in the fibre o e iddool leaving a handle 1 which is desirably fastened into the hem 3 l by e, screw threaded joint 4. It lerstood however that the uppli- Specification of Letters Ictcnt.

rebly of wood and a shank of steeleeeemeo. Nev. m; ieie.

Serial No. 833,351.

once may be made in other forms and that the handle while forming a convenient means for manipulating the appliance'is not necessarily essential to the invention.

The head 3 is desirably composed of two separable halves 5 and 6 which are preferably substan'iielly cylindrical inform and have oppositely disposed flanges 7, 8, and 9, 10 which may be odgustobly secured together. by means of bolts ll, 12 provided with Winged nuts or any other suitable fostenings. I prefer to use win nuts for the reason that 'the sdjustment is then made by the bond of the operator and there is less liklinood of clamping the grinding member or bushing ,ioo tightly upon the shaft, an error which.

would be likely to occur if a wrench were used to tighten these adjusting members.

The members 5 and 6 are desirably rovided with mailing recesses or apertures, t e Walls of Which ore preferably circular in cross section to receive a, bushing 13. The members 5 and 6 are also desirably provided with holes or countersunk recesses, 14:, 15 adapied to receive dowel pins 16, 17 extending outward from the bushing 13. It will be understood however thet the members 5 and 6 may be of different form and that. the exterior of the bushing may be likewise of adifferent formprovidmg the bushing is cylindricully operturedto fit upon the crank shaft to be ground. The member 5 of thehend and also the inclosed bushing'is provided with nlined apertures 19, 20 leading from the hutside ofthe head to the interior of the bushing pref-l ernbly at each side of the handle shank 21,

these apertures being provided to permit the introduction of oil and if desired suitable grinding material and being disposed upon opposite sides of the handle in order that the cool may be used eiihcr as a right hand ed or left handed tool.

l contemplate the use of bushings of various sizes which may be kept in stock or which may be turned on an ordinary lathe to substantially the desired size Without any great inconvenience. These bushings are prefe-ubly made of'luu'dened steel and are grooved after the lathe tool has passed through them. This however is not important since the device will ork properly whether Lhe u'ulls of the aperture are smooth or slightly roughened. In use fi bearing is selected which approximately the size'of the shaft to be med but preferably slightly lerg'er than the shaft, the head portion 6 is uncla'mped from the tool and the bushing inserted, and head 6 then clamped upon toe tool inc-losing the bushing in the manner flowers of emery or Turkish emery. may be introduced through the apertures 19, between the interior cylindrical surface of the bushing and the shaft which is to be ground, preferably ihc shaft is coated with a ing material such as that above described mixed with a lubricant before the tool is laced upon the shaft and thereafter oil is introduced through the apertures 19, 20 as the grinding proceeds. When the tool is thus applied to the shaft the shaft may be held stationary and the tool rotated about the same but preferably the tool is hold by the handle and the engine turned over by hand or by power as may" be most convenient. There is relatively little resistance upon the tool and no difficulty is found in holding the same properly during the grinding operation. It is found in practice that a comparatively few number of turns will serve to true up a slightly Worn shaft or crank pin and that. a badly worn crank pin may be readily trued up to exact cylindrical form by a somewhat longer usage of the tool and by turning up the adjusting screws 11 and 1-2 as the shaft is being ground down. As the grinding proceeds oil is fed in through the apertures 19, Q0 and serves to facilitate the grinding and also to carry off particles of metal which have been ground off the shaft and bushingthrough the slots 21, 22. By the frequent injection of oil the amount of grinding material is gradually lessened as the grinding proceeds and when the operation is finished it is substantially eliminated so that in the latter part of the grinding; and truing operation the shaft is practically given an oil polish leaving its surface smooth and mirror-like.

It is desirable that the handle of the tool be made of wood, not only for convenience in operation by hand but in order that the same may not injure the parts of the engine when the crank pins are being ground. For example, in grinding the crank shafts of automobile engines the tool may be applied. to the crank shaft and the Wooden handle 1 permitted to rest against the Wall of the crank case. The operator may then turn the engine over by hand permitting the tool handle to reciprocate back and forth in the crank case until the crank shaft is sutliciently ground and true. It is also possible.

i, nurse to insert the handle within the cylinder of the engine after the piston has beenremoved and thereafter clamp the head upon the shaft in the manner aforesaid and perform the grinding operation by turning-over the engine in any suitable manner.

It is to be understood that the embodiment of the invention disclosed herein is; illustrative merely and is not restrictive and no: where the members 5 and 6 of the head are made with a cylindrical aperture to receive the bushing the head itself may be used as a grinding and truiug member without the insertion of a bushing since it has been found in practice that either soft steelof cast iron will afford a good surface for causing the abradant to operate properly upon the shaft which is being trued.

it is obvious that this grinding mechanism may be utilized in a machine as well as in the form of a tool disclosed herein, it is also apparent that this invention is adapted to various uses. it is to be understood therefore that the claims annexed hereto are intended to cover all forms in which theinvention may be embodied and all uses to which it may be applied.

Having thus described my invention what I claim as new and desire to secure by Letters Iatent is:

1. A device of the class described comprising a handle member having a head, a cylindrical aperture in said head adapted to receive and to fit snugly a shaft or crank pin to be trued, means for introducing an abradant between the inner Wall of said aperture and the surface of said crank and means for relatively rotating said member and said shaft.

2. A grinding and truing appliance comprising a member having an apertured head, a cylindrical apertured bushing secured therein adapted to receive and to fit a shaft or crank pin to be trued and having an aperture extending through the Walls of said head and said bushing whereby a lubricant or polishing material ma be introduced between the surface of sai bushing and said snift and means whereby said member may be rotated relatively to said shaft.

3. A grinding and'truing appliance comprising a member having a handle, a transversely apertured head formed in separable and relatively adjustable parts, means for relatively adjusting the same, a bushing having a cylindrical aperture secured in said head adapted to receiveand to fit a crank to be trned, and means whereby said member may be rotated relative to the'cranlr pin.

4.. A grinding and trump; appllance coin-r prising a member having a head formedin; two separable and relativelyad ustable parts and means for adjusting the same, an aperture, the walls of which are embraced in said separable parts, a bushing having a cylindrlcal aperture secured in said head, adapted to receive and fit a crank pin to be truer means wherem' said member may be Muted relativeto said head, means for introducing a lubricant between said bushund said shaft and means adapted to permit the abrasive material to escape as the operation proceeds.

A grinding and truing appliance comprising a member having a, head formed in two separable relatively adjustable parts one 01" said members being pro ided. 3th a wooden handle a cylindrimi bushing ndjustably secure l to said head sections and forming a cylindrical aperture, and means for securing the sectinns of :1 head and bushing together whereby {be same may be app 18d i0 a crank shaft.

In testimzmy whereof, I have gigned my mnne to this specification, in the presence of two subscribing witnesses.

HENRY A. WHITE.

Witnexes:

Firewater; A. TENN-WT, Tnonms J. Drmmuoxn. 

